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-rw-r--r--lib/gitlab/incoming_email.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/gitlab/incoming_email.rb b/lib/gitlab/incoming_email.rb
index d323cb9dadf..20fc8226611 100644
--- a/lib/gitlab/incoming_email.rb
+++ b/lib/gitlab/incoming_email.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
module Gitlab
module IncomingEmail
UNSUBSCRIBE_SUFFIX = '+unsubscribe'.freeze